Hardest sum in the times tables is 9x6

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1. Why 9 x 6 sums up our trouble with times tables | The Times
2. It’s OK to struggle with times tables — I did and I’m a mathematician | The Times
3. Hardest times tables question that stumps millions of Brits is revealed | The Sun

The times tables have been the bane of childhoods for millennia. Now, research has found that 9x6 is the sum that most frequently stumps today’s children.

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